Razgradnja diklofenaka u vodi UV-A/TiO2 procesom uz termičku regeneraciju fotokatalizatora

undergraduate thesis

• Title (english): Application of thermal regeneration of photocatalyst in UV-A/TiO2 process for degradation of diclofenac in water
• Author: Borna Božiković
• Mentor: Ana Lončarić Božić (mentor)
• Committee member: Ana Lončarić Božić (predsjednik povjerenstva)
• Committee member: Hrvoje Kušić (član povjerenstva)
• Committee member: Tomislav Bolanča (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2015-09-18, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Environmental Protection in Chemical Engineering

Abstract

Neosporiv je pozitivan učinak farmaceutika no zbog njihovog dospijevanja u okoliš,
danas se smatraju i tzv. novim onečišćivalima. Jedan od najčešće detektiranih farmaceutika u
vodenom okolišu je diklofenak. Zbog potencijalnog negativnog utjecaja na okoliš i ljudsko
zdravlje 3 farmaceutika, među kojima i diklofenak (DCF), uključeni su na tzv. „watch“ listu u
sklopu Okvirne direktive o vodama 2013/39/EU. Stoga se nameće potreba za istraživanjem
učinkovitih ali i ekološki prihvatljivih metoda obrade u svrhu uklanjanja farmaceutika i
ostalih prioritetnih tvari iz voda pri čemu napredni oksidacijski procesi (engl. Advanced
Oxidation Process ) pokazuju veliki potencijal. Cilj ovog rada bi je primijeniti UV-A/TiO2
proces za razgradnju DCF-a u vodi te ispitati mogućnost ponovnog korištenja fotokatalizatora
nakon provedenog postupka termičke regeneracije. Ispitan je utjecaj parametara procesa
(temperatura i vrijeme) na aktivnost fotokatalizatora. Korištenjem kombinacije punog
faktorskog plana i metode odzivnih površina (RSM) utvrđeno je da se maksimalno uklanjanje
DCF-a od 45,5% postiže korištenjem fotokatalizatora regeneriranog pri 200 °C u trajanju od 2
sata što je u skladu s vrijednosti predviđenom RSM modelom (45,1%). Pokazano je da
temperatura termičke regeneracije ima značajan utjecaj na aktivnost fotokatalizatora dok je
utjecaj vremena znatno manji u ispitivanom rasponu utjecajnosti procesnih parametara.

Abstract (english)

Positive effect of pharmaceuticals is unquestionable, but due to their frequent
appearance in the environment they are considered as new pollutants. Diclofenac is one of the
most commonly detected pharmaceuticals in the water environment. Due to the potential
negative effect on the environment and human health three pharmaceuticals, including
diclofenac (DCF) are included on so called “watch” list of EU Water framework directive
2013/39EU. Accordingly the efficient and environmental friendly methods for removal of
pharmaceuticals and other priority pollutant from water are investigated, whereas Advanced
Oxidation Process are found to be highly promising. The aim of this work was to apply UVA/
TiO2 process for DCF removal from water, and to investigate photocatalyst reuse after the
thermal regeneration. The effect of the process parameters (temperature and time) on the
activity of the photocatalyst was investigated. Applying full factorial plan in combination with
response surface methodology (RSM) the optimal process parameters are found to be
Treg=200 °C and treg=2 h. The maximum DCF-a removal of 45,5% is achieved which is close to
the value predicted using RSM model (45,1%). Regeneration temperature is found to be the
influential parameter of the regeneration process, while the regeneration time is found to be
less influential within the investigated range of process parameters.

• Keywords: farmaceutici; diklofenak; fotokataliza; titanijev dioksid
• Keywords (english): pharmaceuticals; diclofenac; photocatalysis; titanium dioxide
• Language: croatian
• URN:NBN: urn:nbn:hr:149:743971
• Study programme: Title: Environmental Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka ekoinženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka ekoinženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2016-12-02 14:19:36